Foundry-riddle.



IVIl F. GLEESON.

FOUNDRY RIDDLE.

APPLlcATnoN FILED 1AN.24, |914.

1,147,858. Patented July 27, 1915,

COLUMBIA PLANOURAFH C0.. WASHINGTON. I7A c.

MICHAEL F. GLEESON, -OF PALMER, MASSACHUSETTS, ASSIGNOR TO WRIGHT WIRE COMPANY, 0F WORCESTER, MASSACHUSETTS, A CORPORATION 0F MAS.SACHTJSIEYJYI,`

FOUNDRY-RIDDLE.

Application led January 24, 1914. Serial No. 814,107.

To all 'whom it may concern.'

Be it known thatI, MICHAEL F. GLEESON,

a citizen of the United States, residing at* Palmer, in the county of Hampden and Commonwealth of Massachusetts, have invented a new and useful Improvement in Foundry- Riddles, of which the following description, taken in connection with the accompanying drawings, is a specification.

The present invention relates to foundry riddles, or sieves, which are employed to riddle the sand used in the making of molds.

An object ofv the invention is to provide a durable and inexpensive device of the class specified, which is capable of easy manufacture.

A further object consists in the production of a riddle in which the mesh is firmly and rigidly secured in the wall thereof by means which grip the wires of the mesh, and

`are conformable to the interstices between said wires.

Other and further objects will appear in the description as hereinafter set forth and in the claims appended thereto.

Referring to the drawings, Figure 1 is a side elevation of the riddle constituting the present invention; Fig. 2 is a fragmentary enlarged vertical sectional view thereof in the plane of one of the strengthening wires, and Figs. 3, 4 and 5 are vertical sectional views through the wall and mesh at successive stages in the formation of the gripping means for the mesh.

Like reference characters are used to designate like parts in the different views.

In the drawings the cylindrical wall 1 of the riddle, which is preferably formed by welding or otherwise joining the ends of a sheet of metal, has its upper edge turned outwardly into a bead 2, having. a stidening ring 3 therein, and is provided intermediate its up er and lower edges, about midway in the eight of the riddle, with a circumferential stiffening corrugation 4.` The lower edge of the wall 1 is bent inwardly and upwardly as shown at 5 in Fig. 3, to form a channel 6 adapted to receive the downwardly bent edge 7 of a wire mesh disk 8 which forms the bottom of the riddle. The said edge 7 extends downwardly into the bottom of the channel 6, and is retained in this position when the portion 5 is bent to lie in a vertical plane, parallel with the wall 1, as shown in Fig. 4. In this position the space between the wall l and the portion 5 is entirely filled by the downwardly bent edge 7 of the disk 8. The final step in the formation of the retaining means for the disk 8 consists in compressing the edge 7 firmly between the wall 1 and portion 5 thereof, and, at the same time, forming a bead of peculiar character in both sides of the fold inclosing the edge 7, as shown in Fig. 5. Any convenient means may be emplcyed for imparting the desired form to the bead. I prefer to employ a pair of rolls for the purpose, between which the folded edge is passed, so that the compression of the sides of the fold, and the shaping of the same, may be accomplished simultaneously. The outer or female roll is provided with a peripheral recess, adapted to impart a substantially semi-circular cross section to the bead 9 formed in the wall 1, while the inner or male roll is provided with a peripheral V- shaped projection, in opposition to the recess on the other roll, to impart a substantially V-shaped cross section to the bead 10 of the portion 5. As clearly shown in Figs. 2 and 5, the bead 10 crowds the adjacent portion of the disk edge 7 into the interior of the bead 9, whereby the disk 8 is stretched and held taut in its position within the riddle. Furthermore, sufficient pressure is eX- erted on the fold, in its passage between the rolls, to cause the sides thereof to conform substantially to the interstices between the wires of the edge 7 inclosed thereby, as clearly shown in Figs. 1, 2 and 5.

A plurality of supporting wires 11 are disposed diametrically of said riddle below the disk 8, their ends being passed through apertures formed in the flange 5 and wall l, and preferably carried up above the corrugation 4, and through apertures 12 in the wall 1, each of said ends being secured by a downward bend 13. Rigidity is imparted to the wire by bending each end, as at 14, to conform to the corrugation 4. By means of these wires 11 the disk 8 is prevented from stretching and sagging under the weight of the sand supported thereby.

I claim,

l. In a foundry riddle, a mesh disk having a depending edge, a cylindrical wall surrounding said disk and having a portion folded inwardly upon said wall to inclose said depending edge between it and said wall, with a projecting bead formed simulraeentea July er, reis.

members passing through both sides of said fold below the plane of the disk, and attached to saidwall above the plane of the disk.

Dated this sixteenth day of January 1914. 15

MICHAEL F. GLEESON.

Witnesses PENELOPE COMBERBAGH, NELLIE WI-IALEN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents.

Washington, D. C. 

